在 Rails 中，如何销毁“连接表项”？而不删除真实记录？
我现在很困惑，我不知道如何删除/销毁连接表中的记录：
class Task < ActiveRecord::Base
belongs_to :schema
belongs_to :to_do
end
class Todo < ActiveRecord::Base
belongs_to :schema
has_many :tasks
end
class Schema < ActiveRecord::Base
has_many :todos
has_many :tasks, :through => :todos
end
>> sc = Schema.new
>> sc.tasks << Task.new
>> sc.tasks << Task.new
>> sc.tasks << Task.new
...
>> sc.tasks.delete(Task.first) # I just want to delete/destroy the join item here.
# But that deleted/destroyed the Task.first.
如果我只想销毁关系项，我该怎么办？
I get confuse now, I don't know how to delete/destroy a record in a join table:
class Task < ActiveRecord::Base
belongs_to :schema
belongs_to :to_do
end
class Todo < ActiveRecord::Base
belongs_to :schema
has_many :tasks
end
class Schema < ActiveRecord::Base
has_many :todos
has_many :tasks, :through => :todos
end
>> sc = Schema.new
>> sc.tasks << Task.new
>> sc.tasks << Task.new
>> sc.tasks << Task.new
...
>> sc.tasks.delete(Task.first) # I just want to delete/destroy the join item here.
# But that deleted/destroyed the Task.first.
What can I do if I just want to destroy the relation item?
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如果您想删除 sc 中的所有任务：
如果您想删除 sc 中的特定任务：
我希望有所帮助。
If you want to delete all tasks in sc:
If you want to delete a specific task in sc:
I hope that helps.
如果您想从连接表（如
amenities_lodgings）中删除所有记录而不使用任何对象，您可以使用：If you want to delete all records from join table like
amenities_lodgingswithout using any object you can use:删除所有加入记录
如果要删除所有加入记录，可以使用
.clear：Delete All Join Records
If you want to delete all the join records, you can use
.clear: